Re: [wsjt-devel] WSJT-X: Working frequency suggestions

[Bill S. <g4...@cl...>]

On 26/06/2017 19:16, Jim Brown wrote:
>> On Mon,6/26/2017 11:07 AM, Bill Somerville wrote:
>> BTW the definition of narrow band digital modes is problematic as 
>> region 3 defines NB as not exceeding 2kHz bandwidth even though it 
>> shares spectrum with SSB which is allowed up to 6kHz b/w. That means 
>> region 3 cannot use MSK144 (>2.4kHz b/w) in sections allocated to 
>> narrow band digital (NB). Therefore in region 3 MSK144 on 6m would 
>> have to be above 50500 amongst the other wide band (WB) users like 
>> FM. As such a KL7 to Asiatic Russia digital MS contact would have to 
>> be cross frequency!! That seems rather unreasonable but that is where 
>> we currently are.
>>
>
> That's a great example that exposes issues with the IARU allocation 
> and coordination process. And these are often issues that take decades 
> to be worked out. 

Hi Jim,

it seems that individual country region 3 band planners have already 
addressed this issue, for example Iizumi, JG1APX, has sent me a JA band 
plan (amended 5th Jan 2015) which expands the NB bandwidth (narrow 
bandwidth) from the IARU region 3 general "no greater than 2kHz" to "up 
to 3kHz" for bands above 160m. So at least in JA MSK144 is usable in NB 
Data sub-bands.

73
Bill
G4WJS.